Just got my K101 from the drop yesterday. I was skeptical of these initially, but overall it's quite a nice device. On the "bad" side, the shoulder buttons are crap, and there appears to be some scaling issues with the NES/SMS emulation (haven't tried support for any of the other, non-GBA systems out yet). On the "good" side, the display scales the native GBA resolution brilliantly, and offers 1:1 support as well, the overall build quality is better than I expected, with the face buttons being firm and tactile, though not quite as robust as the original GBA but still quite good.

Pleasantly surprised to find the package also included screen protectors (which are a must, as the LCD itself is exposed - the shell has no lens of its own), as well as replacement conductive pads for the buttons (and a screwdriver to disassemble the shell!), all of which suggests this isn't just a cash-grab, but rather a device created by someone who has more than just a passing interest in the GBA.

I have a proper backlit GBA SP AGS-101, but have become rather paranoid about carrying it around for fear of damaging/losing it, now that they've become fairly rare (and a little pricey!), bu I can just throw the Revo in my bag and play on-the-go without any worries. Love it!

How did you get the GBA modded for the backlighting? Don't think you can even find anyone offering that service these days, and I'm too ham-fisted to mess about with it myself. Good to hear your impressions are positive overall, mine are en route.

The AGS-101 model was natively backlit, no modding required. :) That said, I have also done the GBA (original) backlight mod by ripping the backlit screen out of an AGS-101 and sticking it into an original GBA. I managed to pick up an AGS-101 on the cheap that was basically destroyed, but still had a good display, but even those are hard to find these days... The adapter cables are pretty easy to find on eBay, and it can be done without any soldering, with the right cable, but a rotary tool is all but necessary to cleanly mod the shell to house the new display. No one is really offering the service anymore because of the scarcity of the backlit displays, but if you can get your hands on one, you could probably head over to http://reddit.com/r/gameboymarketplace and get one of the modders there to install it, if that's a thing you're interested in.

Did you watch the video they linked? I'm not sure if they just added it for the most recent drop, but it says there is scaling issues for systems other than GBA because it's designed primarily for the GBA.